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Cylinder 1 and 4 misfires and loss of power

Tiny
ANDREWMWICIGI
  • MEMBER
  • 2003 VOLKSWAGEN GOLF
  • 75,000 MILES
My car misfires whenever it warms up. I get the following fault codes
16685: Cylinder 1 misfire
16688: Cylinder 4 misfire
16684: Random/Multiple misfire
16825: Evaporative Emission System incorrect purge flow.

It loses power and regains as you drive on.
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Monday, September 17th, 2012 AT 5:07 PM

3 Replies

Tiny
ALLPRO
  • MECHANIC
  • 48 POSTS
These vehicles are really prone to coil failures. I would swap the coils to cylinders 2 and 3 and see if the miss follows.
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Monday, September 17th, 2012 AT 7:54 PM
Tiny
ANDREWMWICIGI
  • MEMBER
  • 2 POSTS
Thanks. I have renewed all 4 coils and still experience the same problem. When the misfire occurs, I realised that the fuel injectors 1 and 4 do not have electrical pulses. Immediately I clear the fault codes, power on the connectors resumes and thereafter disappears. The engine is also very hot then but have no temperature sensor faults. Could my ECU?
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Tuesday, September 18th, 2012 AT 6:56 AM
Tiny
ALLPRO
  • MECHANIC
  • 48 POSTS
It sounds alot like a computer problem.

The injector driver in the ecm might be faulty.
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Tuesday, September 18th, 2012 AT 12:42 PM

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